A4989

更新时间： 2024-02-28 17:14:51

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器栅极电机栅极驱动
页数	文件大小	规格书
17页	497K
描述
The A4989 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higher power industrial bipolar 2-phase stepper motors (typically 30 to 500 W).

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A4989 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	TSSOP
包装说明：	TSSOP, TSSOP38,.25,20	针数：	38
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	2.24
Samacsys Confidence：	3	Samacsys Status：	Released
2D Presentation：	https://componentsearchengine.com/2D/0T/567805.2.1.png	Schematic Symbol：	https://componentsearchengine.com/symbol.php?partID=567805
PCB Footprint：	https://componentsearchengine.com/footprint.php?partID=567805	3D View：	https://componentsearchengine.com/viewer/3D.php?partID=567805
Samacsys PartID：	567805	Samacsys Image：	https://componentsearchengine.com/Images/9/A4989SLDTR-T.jpg
Samacsys Thumbnail Image：	https://componentsearchengine.com/Thumbnails/2/A4989SLDTR-T.jpg	Samacsys Pin Count：	38
Samacsys Part Category：	Integrated Circuit	Samacsys Package Category：	Small Outline Packages
Samacsys Footprint Name：	TSSOP	Samacsys Released Date：	2017-02-01 09:55:39
Is Samacsys：	N	高边驱动器：	YES
输入特性：	SCHMITT TRIGGER	接口集成电路类型：	HALF BRIDGE BASED IGBT/MOSFET DRIVER
JESD-30 代码：	R-PDSO-G38	JESD-609代码：	e3
长度：	9.7 mm	湿度敏感等级：	2
功能数量：	1	端子数量：	38
最高工作温度：	85 °C	最低工作温度：	-20 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP38,.25,20	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	座面最大高度：	1.2 mm
最大压摆率：	10 mA	最大供电电压：	5.5 V
最小供电电压：	3 V	标称供电电压：	5 V
电源电压1-最大：	50 V	电源电压1-分钟：	12 V
表面贴装：	YES	温度等级：	OTHER
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.5 mm	端子位置：	DUAL
宽度：	4.4 mm	Base Number Matches：	1

A4989 数据手册

A4989

Dual Full-Bridge MOSFET Driver

with Microstepping Translator

Features and Benefits

Description

▪ 2-wire step and direction interface

▪ Dual full-bridge gate drive for N-channel MOSFETs

▪ Operation over 12 to 50 V supply voltage range

▪ Synchronous rectification

The A4989 is a dual full-bridge gate driver with integrated

microstepping translator suitable for driving a wide range of

higherpowerindustrialbipolar2-phasesteppermotors(typically

30 to 500 W). Motor power is provided by external N-channel

power MOSFETs at supply voltages from 12 to 50 V.

▪ Cross-conduction protection

▪ Adjustable mixed decay

This device contains two sinusoidal DACs that generate the

referencevoltagefortwoseparatefixed-off-timePWMcurrent

controllers.Theseprovidecurrentregulationforexternalpower

MOSFET full-bridges.

▪ Integrated sinusoidal DAC current reference

▪ Fixed off-time PWM current control

▪ Enhanced low current control when microstepping

▪ Pin compatible with the A3986

Motor stepping is controlled by a two-wire step and direction

interface, providing complete microstepping control at full-,

half-, quarter-, and sixteenth-step resolutions. The fixed-off

time regulator has the ability to operate in slow-, mixed-, or

fast-decaymodes,whichresultsinreducedaudiblemotornoise,

increased step accuracy, and reduced power dissipation.

Package: 38 pin TSSOP (suffix LD)

The translator is the key to the easy implementation of this

IC. Simply inputting one pulse on the STEP input drives the

motor one step (full, half, quarter, or sixteenth depending on

themicrostepselectinput).Therearenophase-sequencetables,

highfrequencycontrollines,orcomplexinterfacestoprogram.

This reduces the need for a complex microcontroller.

Approximate size

Continued on the next page…

Typical Application Diagram

4989-DS, Rev. 1

12 3 4 5 6 7...17

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